I have a aspx web page with several hidden(visible=false) panels on it.
Depending on the task the user is going to perform I show or hide the
appropriate panel. What I'm discovering is that my controls on the panels are
not firing their events if the panel was initially hidden when the page
loaded.

For instance, i have a panel with a button and a 'onclick' event defined.
The onclick will only work if the panel is intially visible when the page
loads but not if the panel was hidden when the page loaded. I also noticed
this with my drop down list not loading list items either.

Is this behavior by design? If so what should I do to get the events to fire
after making a panel visible after it was hidden initially? Any help is
greatly appreciated!!!